How do I create an input pin in BP with my c++ UFunction?

Development Programming & Scripting
1

I’ve created a UFunction that takes a int as a parameter. I figured this parameter would be visible in BP when I call the function there but I don’t see it listed anywhere on my Get function that is listed. The int parameter is used to fetch an array element at said indice.

2

Is your function declared as blueprintpure? In the header it looks like this:

public:
	UFUNCTION(BlueprintPure, Category = "Utilities|String")
		static float SolvePostFixExpression(TArray<FString> ExpressionArray);

and in the cpp it should just look like a standard function. input pins will be the arguments:

float ULsystemLibrary::SolvePostFixExpression(TArray<FString> ExpressionArray)
{
     return Solution;
}

The function “SolvePostFixExpression” shows up as a blueprint node with a variable pin “ExpressionArray”. is that what you mean?

3

Indeed! Thank you. I was also forgetting to add a category, I don’t know if that breaks anything but either way. I was trying to use BlueprintNativeEvent and BlueprintImplementableEvent.